Annotation	pos	Low Freq (Hz)	High Freq (Hz)	Begin Time (s)	End Time (s)	duration	filename
D	49.712496	216.6645000000001	988.5395	49.562496	49.862496	0.2999999999999971	20250411_071035UTC_V00OS11.WAV
E	43.487496	460.41872500000034	731.2522750000004	42.999996	43.974996	0.9749999999999944	20250411_071035UTC_V00OS11.WAV
D	47.281248	230.20724999999965	947.9177499999996	47.124998	47.437498	0.3125	20250411_071035UTC_V00OS11.WAV